After discovered the Shruhi at the last Modular Square shop meeting near Paris,
I decided to build my own.
So this is the result with SMR-4 filter board, build with old, second hand or stolen to office parts :))

atmega644p was replaced by a atmega644,
LT1054 by a LM2662
and firmware was rebuild under windows.

Re. boards: impressive! May I ask what kind of hookup wire you use there? I know it sounds like a silly question, but I bought a load of solid-core wire a little while ago, which seems quite hard to work with. Do you use single-core or stranded wire?

Re. Poly-800: I’ve had all kinds of problems with the Hawk-800 mods installed in my EX-800, I have to say. The Hawk-800 developer, Mike, has always been very helpful, to the extent of sending numerous detailed emails of things to test, and several replacement chips, at his own expense. There’s a chance that there are some underlying issues with my original EX-800 hardware, and some unforeseen problems associated with hardware upgrades to the Hawk-800 mod itself, which shouldn’t effect you, if you’re buying the mods now, so don’t necessarily let that put you off. The added features really are pretty amazing, and certainly bring a new dimension to the old sound.

@nicoo
Yeah, the Moog Slayer mod is impressive. You have to watch your speakers (and ears) though, It gets very LOUD! I also bought Mike’s AtomaHawk mod board, which allows MIDI control of the Slayer mod, plus MIDI-controlled 12/24db filter switching. Makes a terrible mess of the inside of synth though…

Re wire: I’ve just remembered I have a spare reel of Cat5 cable at home. That should keep me supplied with wire for the foreseeable future :)